I see that the OP started the thread linking tattoos with pierced ears.
It's maybe a good comparison.
For example, double ear piercing has for decades been well established as a widespread custom among women, especially. Often mothers and daughters will have it done together, or influence each other in having it done, anyway.
Since the late 1970s, it has been an increasingly widespread custom.
For example a woman who became double pierced aged in her mid 20s in 1979, together with her mother in her mid 50s, may now be aged about 60 and 90 respectively, and they may well continue to wear multiple pairs of earrings in their double holes.
I think tattoos may well soon be in a similar category for women as well as men. While for women to get them as a really widespread custom is more recent that for men to get them, it has now become so thorougly established as a custom in North America that the ankle/foot or shoulder/arm/wrist tattoo may soon be regarded simply as double pierced ears are already: as a not unusual and very widepread personal enhancement and style preference.
That being said, I think that Christian women as well as men are likely increasingly to consider the effectiveness of faith based designs in witness, such as the Christian fish symbol, <><, or a Bible ref., or short quote, etc.
Blessings.